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Environmental conventions are one of the most dependable sources of UPSC Prelims questions. In Tootler's bank of transcribed papers, 35 General Studies questions between 2008 and 2025 ask about international environmental agreements, summits, funds and coalitions, spread across 13 different exam years. Lists of conventions online run to dozens of entries. The questions do not.
Ten treaties, summits and funds account for most of what UPSC has asked. This guide takes them one at a time, gives the facts you need for each with a link to the official text or page it comes from, and notes the year each was tested. The last section covers the long tail of named initiatives, which follow a pattern of their own.
Source: Tootler's transcription of UPSC Prelims question papers.
This guide is part of Tootler's series on environment and ecology for UPSC, which maps all 284 environment questions in Prelims by topic.
1. The UN Framework Convention on Climate Change
The UNFCCC is the parent treaty for everything that follows on climate. Its text records that it was opened for signature at Rio de Janeiro during the United Nations Conference on Environment and Development in June 1992, and its Annex I lists the countries that took on specific commitments under it. UPSC asked where it was drawn up in 2010; most later climate questions assume you know it is the framework under which the Kyoto Protocol and the Paris Agreement sit.
2. The Kyoto Protocol and the Clean Development Mechanism
Kyoto turned the Convention's goals into binding emission limits for Annex I countries, and it is the source of the carbon credit vocabulary UPSC keeps testing (2008, 2009, 2011, 2016). The key provision is Article 12, which defines the Clean Development Mechanism. Projects in countries not in Annex I produce "certified emission reductions", and Annex I countries may use those reductions towards part of their own commitments. Hold on to that direction of flow; the 2008 question turned on which group of countries hosts the projects.
The 2016 question tested whether you could place these terms in the right treaty:
Consider the following pairs: Terms sometimes seen in the news - Their origin 1. Annex-I Countries : Cartagena Protocol 2. Certified Emissions Reductions : Nagoya Protocol 3. Clean Development Mechanisms : Kyoto Protocol Which of the pairs given above is/are correctly matched?
Show answer
(c) 3 only
From a third-party answer key, not yet checked against UPSC's official key.
3. The Paris Agreement
Paris is the treaty UPSC now asks about most directly. Article 2 sets the goal of holding warming "well below 2°C above pre-industrial levels and pursuing efforts to limit the temperature increase to 1.5°C". Article 6 lets countries cooperate voluntarily towards their nationally determined contributions: through "internationally transferred mitigation outcomes", through a new mechanism supervised under the Agreement, and through a framework for non-market approaches. UPSC asked about the 2015 agreement in 2016 and about Article 6 in 2025:
Consider the following statements: Statement I: Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change. Statement II: Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets. Statement III: Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets. Which one of the following is correct in respect of the above statements?
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(a) Both Statement II and Statement III are correct and both of them explain Statement I
From a third-party answer key, not yet checked against UPSC's official key.
4. The Montreal Protocol
The Montreal Protocol protects the ozone layer by phasing out the production and consumption of ozone-depleting substances. It was signed in 1987, entered into force in 1989, and has been amended six times, most recently by the Kigali Amendment, which brought hydrofluorocarbons under it. UPSC asked which protocol deals with ozone-depleting substances in 2015, offering Kyoto and Nagoya as distractors.
5. The Ramsar Convention on Wetlands
The Convention on Wetlands was adopted at Ramsar, Iran, on 2 February 1971 and came into force in 1975, with UNESCO as its depositary. Two of its ideas recur in Prelims. One is wise use: the 2010 question asked how countries should manage their Ramsar sites. The other is the Montreux Record, adopted at the 1990 conference of the parties in Montreux, which identifies Ramsar sites in need of priority conservation attention, with the consent of the country concerned:
If a wetland of international importance is brought under the 'Montreux Record', what does it imply?
Show answer
(a) Changes in ecological character have occurred, are occurring or are likely to occur in the wetland as a result of human interference
From a third-party answer key, not yet checked against UPSC's official key.
For the Indian sites themselves, see the wetlands table in wildlife sanctuaries in India.
6. The UN Convention to Combat Desertification
Established in 1994, the UNCCD describes itself as the only legally binding framework set up to address desertification and the effects of drought, with 197 parties. UPSC asked about its approach and focus in 2016, and in 2014 included it in a question on which agreements bear on biodiversity.
7. The Cartagena Protocol on Biosafety
The Cartagena Protocol deals with the safe handling of living modified organisms from modern biotechnology that may have adverse effects on biological diversity, taking human health into account as well. It was adopted on 29 January 2000 and entered into force on 11 September 2003. UPSC asked in 2009 which Indian ministry implements it, and used it as a wrong pairing for "Annex-I countries" in 2016.
8. The Rio summits and Agenda 21
Three UN conferences produce a steady stream of questions (2008, 2015, 2016, 2018). The 1992 Earth Summit in Rio de Janeiro, held from 3 to 14 June, gave the world Agenda 21, a programme of action for sustainable development in the 21st century. The follow-up World Summit on Sustainable Development, or Rio+10, was held in Johannesburg in 2002. Rio+20, the UN Conference on Sustainable Development, returned to Rio de Janeiro on 20 to 22 June 2012. Questions mix these up deliberately, for example by attaching Agenda 21 to Johannesburg.
9. The climate funds: GEF and GCF
Two funds are asked about often enough to keep apart. The Global Environment Facility is the financial mechanism for six multilateral conventions, covering nature, climate and pollution (asked in 2014). The Green Climate Fund was established in 2010 by the parties to the UNFCCC as an operating entity of that convention's financial mechanism, and supports developing countries on climate (asked in 2015). The 2015 question also tested who founded the GCF, so its origin in the UNFCCC is the fact to remember.
10. IUCN and CITES
These two are tested as a pair because they are easy to confuse. The International Union for Conservation of Nature is a membership union of government and civil society organisations, created in 1948; it is not a treaty and not a UN body. CITES, the Convention on International Trade in Endangered Species of Wild Fauna and Flora, is a treaty between governments on trade in wild species. UPSC asked about the difference in 2015, about the wildlife trade monitoring network TRAFFIC in 2017, and in 2023 about which organisation the Invasive Species Specialist Group belongs to.
The long tail: named initiatives
The rest of the questions in this set ask about a single named initiative: the International Solar Alliance (2016), the Climate and Clean Air Coalition (2017), the Global Alliance for Climate-Smart Agriculture (2018), the New York Declaration on Forests (2021), the Climate Action Tracker (2022), or the COP28 Declaration on Climate and Health (2025). They share a format. The statements ask who launched it, where, whether it is legally binding, and whether India is part of it. When you read about a new initiative in current affairs, note those four facts and nothing more; that is what the question will be built on. The air pollution guide shows this for the Climate and Clean Air Coalition.
Frequently asked questions
Which environmental conventions are most important for UPSC Prelims?
Going by previous questions, the climate treaties come first: the UNFCCC, the Kyoto Protocol and the Paris Agreement. After them come the Ramsar Convention on wetlands, the Montreal Protocol on the ozone layer, the Convention to Combat Desertification, the Cartagena Protocol on biosafety, the Rio summits and the climate funds that finance these agreements.
What is the Montreux Record under the Ramsar Convention?
It is a list of Ramsar sites in need of priority conservation attention because their ecological character has changed or is likely to change. It takes its name from the 1990 Conference of the Parties held in Montreux, Switzerland, and a site is added only with the approval of the country concerned.
What does Article 6 of the Paris Agreement do?
It lets countries cooperate voluntarily to meet their nationally determined contributions. It covers cooperative approaches that use internationally transferred mitigation outcomes, sets up a mechanism supervised under the Agreement to support emission reductions, and creates a framework for non-market approaches to sustainable development.
What is the difference between the Global Environment Facility and the Green Climate Fund?
The Global Environment Facility serves as the financial mechanism for six multilateral environmental conventions, covering nature, climate and pollution. The Green Climate Fund was established in 2010 by the parties to the UNFCCC as an operating entity of that convention's financial mechanism, and focuses only on climate action in developing countries.
Where was the UNFCCC opened for signature?
The UNFCCC was opened for signature at the United Nations Conference on Environment and Development, the Earth Summit, held in Rio de Janeiro in June 1992. One of the conference's major results was Agenda 21, a programme of action for sustainable development in the 21st century.